JP3094923U - Auxiliary ladder - Google Patents

Abstract

(57) [Summary] (Modifications required) [Problem] Workers can easily install on fixed ladders provided on devices such as elevated water tanks, and can safely move up and down via fixed ladders. Provide a helping ladder that can. SOLUTION: A hanging tool 3 having a shape capable of gripping a stepping member on an upper stage side of a ladder fixed at one end side in a width direction, and the other end side attached to an upper end of a ladder frame 1; Is disposed on the vertical frame member of the ladder frame separated from the upper end of the ladder frame by a predetermined distance, and has a shape capable of gripping the stepping member 2 on the lower side of the fixed ladder at one end, and penetrating through the other end. An auxiliary ladder provided with a steady rest arm 4 having a hole and a locking device 5 for retaining the steady rest arm.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention is intended for the inspection, repair and cleaning of equipment such as elevated water tanks. Can be installed at the bottom of a fixed ladder provided on equipment such as an elevated water tank by a person Auxiliary ladders to use.

[0002]

[Prior art]

  For example, points of equipment such as elevated water tanks and cooling towers installed on structures When performing work such as inspection, repair, and cleaning, workers should work on the elevated water tank and cooling tower. Use a fixed ladder provided on the device such as a hose to move up and down. But the fixed ladder The walls of the equipment to prevent people from easily climbing into equipment such as elevated tanks. It is installed only on the upper part of the surface, and the lower part of the device wall, that is, the device is installed. From the surface of the structure (hereinafter referred to as the device installation surface) to 1.2 m to 1.6 m Fixed ladders are generally not installed (see Figure 3).

[0003]   Therefore, the worker moves up and down in the range of 1.2 m to 1.6 m in height from the device installation surface. However, a ladder may be installed diagonally between the equipment installation surface and equipment such as an elevated water tank. In other words, a step of appropriate height was placed on the equipment installation surface.   However, if the ladder is installed at an angle, the worker will move it up and down. There is a problem that the ladder easily shifts and the posture of the worker becomes unstable. Even when the step is placed on the equipment installation surface, the operator can move up and down to the end of the step. However, there is a drawback that the posture of the worker becomes unstable.

[0004]

[Problems to be solved by the device]

  The present invention aims to solve the above problems, and allows an operator to install equipment such as an elevated water tank. It can be easily installed on the fixed ladder provided on the table, and through the fixed ladder. The purpose is to provide an auxiliary ladder that can be safely lifted and lowered.

[0005]

[Means for Solving the Problems]

  The present invention is an auxiliary ladder that is detachably suspended from the bottom of a fixed ladder. It is possible to grip the step member on the upper stage of the ladder fixed to one end side across the width direction. A hanging tool that has a shape and the other end is attached to the upper end of the ladder frame It is arranged on the vertical frame member of the ladder frame that is separated from the edge by a predetermined distance, and It has a shape that can hold the stepping member on the lower side of the ladder fixed to the end, and a through hole at the other end. And a locking tool for locking the steady arm. A featured auxiliary ladder.

[0006]   In the present invention, the suspending device includes an upper stopper member having an L-shaped section and a lower stopper member having an L-shaped section. A topper member and a locking tool for locking the movement of the lower stopper member in the front-rear direction are provided. It is preferable that

[0007]

[Embodiment of device]

  FIG. 1 (a) is a front view illustrating the structure of an auxiliary ladder of the present invention, and FIG. 1 (b) is the same. It is a side view. Further, FIG. 2 is a perspective view of the hanging device 3 shown in FIG.   The auxiliary ladder according to the embodiment of the present invention having the structure illustrated in FIGS. 1 and 2 is an example. For example, as shown in FIG. 3, remove it at the bottom of the fixed ladder 7 provided in the elevated water tank 6. Suspend and use as much as possible. In FIG. 3, reference numeral H indicates a device installation from the lower end of the fixed ladder 7. Shows the distance to the placement surface, and the symbol h indicates from the lower end of the auxiliary ladder of the present invention to the equipment installation surface. Indicates the interval. FIG. 3 is a perspective view showing a use state of the auxiliary ladder of the present invention. 4 is a cross-sectional view showing the main part of FIG.

[0008]   The auxiliary ladder according to the embodiment of the present invention, as shown in FIGS. And the foot member 2 attached to the ladder frame 1 and the rear surface of the upper end of the ladder frame 1 The suspended hanging tool 3 and the lower part of the hanging tool 3 are separated from the upper end of the ladder frame 1 by a predetermined distance. And a steady rest arm 4 arranged on the vertical frame member of the ladder frame 1. Ladder frame Reference numeral 1 is composed of left and right vertical frame members and an upper horizontal frame member. It has a gate shape connected by a horizontal frame member. Auxiliary ladder according to the embodiment As shown in FIG. 1A, the steady rest arm 4 is on the right side of the ladder frame 1 when viewed from the front. The vertical frame member on the left side of the ladder frame 1 when viewed from the front is swung. The stop arm 4 may be provided.

[0009]   The hanging device 3 includes an upper stopper member 3A having an L-shaped section and a lower stopper member having an L-shaped section. A thumbscrew as a locking tool for locking the movement of the member 3B and the lower stopper member 3B in the front-rear direction. Equipped with 3C.   As shown in FIG. 2, the upper stopper member 3A having an L-shaped cross section has a horizontal portion formed in a U shape. The horizontal part is made to pass through the male screw part of the thumbscrew 3C, and it is movable in the front-back direction. Through holes are formed on the left and right. On the other hand, the lower stopper member 3B having an L-shaped cross section has an upper stopper. It has a shape corresponding to the pad member 3A, and the horizontal part is formed in a U shape when viewed from above. It also has a hanging part and a bent part following it. A curve following the hanging part of the lower stopper member 3B The barb is bent inward so that the gap with the ladder frame 1 becomes narrower as it goes downward. It is flaked and molded. On the inner surface of the hanging part of the lower stopper member 3B, The plate-shaped rubber 3D is attached to the lower stopper member 3B. The rubber plate 3D is not attached to the inwardly bent portion. The lower stopper The above-mentioned thumbscrew 3C is fixed to the horizontal portion of the material 3B by, for example, welding.

[0010]   Attach the hanging part of the upper stopper member 3A of the hanging device 3 to the rear surface of the upper end of the ladder frame 1. Attach the lower stopper member 3B to which the thumbscrew 3C is fixed. Then, pass the male screw part of the thumbscrew 3C through the through hole formed in the upper stopper member 3A, and The lower stopper member 3B can be freely Can be made.

[0011]   Therefore, in the state of using the auxiliary ladder according to the embodiment of the present invention, as shown in FIG. Suspend the ladder frame 1 with the hanging tool 3 under the ladder 7 and The lower stopper to which the hanging part of the upper stopper member 3A and the plate-shaped rubber 3D are attached later The stepping member 8 on the upper stage side of the fixed ladder 7 is sandwiched between the hanging part of the member 3B and the lower stocker. Butterflies with the inward bending part following the hanging part of the par member 3B positioned below the step member 8 By turning the wing nut screwed onto the screw 3C, as shown in FIG. Fasten the upper stopper member 3A and the lower stopper member 3B, and secure them with the hanging tool 3. It is possible to grip the stepping member 8 on the upper side of 7.

[0012]   On the other hand, as shown in FIGS. 1 and 4, the steady arm 4 has an inverted U-shape at one end. It is formed into a shape and has a through hole at the other end. Inverted U-shape at one end of steady arm 4 As for the shape, as shown in FIG. 4, the lower stepping member 8 of the fixed ladder 7 is U-shaped at one end. It is designed to fit inside. Also, the other end of the steady arm 4 The through hole provided in the butterfly is a butterfly that is fixed to the ladder frame 1 by welding, for example, as a locking tool. With the wing nut threaded through the male thread of the screw 5, as shown in Fig. 1, steady rest The arm 4 can be moved vertically by a predetermined distance and the thumbscrew 5 can be turned. The size allows it to be rotated. The other end of the steady arm 4 The vertical length of the section is determined by the hanging tool 3 by grasping the step member 8 on the upper stage side of the fixed ladder 7. While holding it, move the steady arm 4 up and down by a predetermined distance. The lower stage of the ladder 7 fixed by one end of the steady rest arm 4 formed in an inverted U shape. It is appropriately determined so that the side tread member 8 can be gripped.

[0013]   In the auxiliary ladder according to the embodiment of the present invention, the width of the auxiliary ladder is fixed. It has a width that fits inside and its entire length is provided with a fixed ladder 7 as shown in FIG. It is sized so that the auxiliary ladder of the present invention can be hung in the range not covered. Implementation of the present invention The weight of the auxiliary ladder in the form of The members are selected so that they can be suspended in the section.

[0014]   However, in FIG. 1 and FIG. 2, reference numeral 11 is a fixed ladder 7 for fixing the auxiliary ladder according to the embodiment. Is an arrow indicating the moving direction of the stopper member 3B when the stopper member 3B is installed at the bottom of the Is an arrow indicating the moving direction of the steady arm 4 at that time.   Hereinafter, a method of using the auxiliary ladder of the present invention will be described in more detail with reference to FIG. (See also Figures 1-3).

[0015]   When performing inspection, repair, cleaning, etc. of equipment such as an elevated water tank, first Turns the thumbscrew 3C of the hanging device 3 to one side to loosen it, and the upper stopper member 3A and the lower stopper part The auxiliary ladder of the present invention is lifted and the fixed ladder 7 The stepping member 8 is suspended by the suspending tool 3. In that state, the upper stopper member 3A and the lower strike The stepping member 8 is sandwiched by the upper member 3B, and the thumbscrew 3C of the hanging device 3 is turned to the other side and tightened. Then, the lower stopper member 3B is locked to the upper stopper member 3A with the thumbscrew 3C.

[0016]   Next, the worker turns the thumbscrew 5 that locks the steady arm 4 to one side and loosens it. Therefore, adjust the vertical position and front-back direction position of the steady rest arm 4 to The lower stepping member 8 of the fixed ladder 7 is housed in the inverted U-shape on one end side of the boom 4, Tighten the screw 5 by turning it in the opposite direction, and secure the steady rest arm 4 with the thumbscrew 5. Lock on frame 1.

[0017]   In this way, the auxiliary ladder of the present invention can be easily installed under the fixed ladder 7 by the operator. It can be installed and, in use, it has two pieces, the suspension 3 and the steady arm 4. Since the foot member 8 of the fixed ladder 7 is securely held in place, an operator can raise the ladder. When descending, even if the unbalanced force acts on the auxiliary ladder, And lateral swaying can be suppressed.

[0018]   Further, the auxiliary ladder of the present invention is such that the rear surface of the head portion of the ladder frame 1 is fixed in use. When the worker moves up and down the ladder to contact the stepping member 8 of the It is possible to further suppress shaking.   As a result, when inspecting, repairing, or cleaning the inside of the elevated water tank, the worker does not fix it. It is possible to safely go up and down through the car 7.

[0019]   The material of the ladder frame 1 and the step member 2 of the auxiliary ladder of the present invention is limited to a specific material. No, but use aluminum alloy, wood, lightweight steel, etc. to reduce weight Is desirable. Aluminum alloy is used as the material of the ladder frame 1 and the stepping member 2. It is advantageous in terms of life and weight reduction, and the material of the suspension 3 and the steady arm 4 is made of steel. The material is advantageous in terms of strength. Also, as a locking tool, a thumbscrew and a butterfly The same nut is used, but the auxiliary ladder can be easily installed on the fixed ladder 7. This is desirable.

[0020]   Of course, the suspending tool 3 provided on the auxiliary ladder of the present invention has a fixed ladder 7 for fixing the auxiliary ladder. Since it also has a function of hanging at the bottom of the It is strong enough to carry on and off with equipment, and The strength of the stop arm 4 and the thumbscrew 5 that locks it is controlled by the fixed ladder 7. When the contractor moves up and down the auxiliary ladder, the runout of the auxiliary ladder for the fixed ladder 7 It is said that the strength can suppress this.

[0021]   The auxiliary ladder of the present invention is limited to the fixed ladder installed in the elevated water tank. It can be applied to the fixed ladder of various devices.

[0022]

【Example】

  As shown in FIGS. 1 to 4, the fixed ladder 8 provided on the elevated water tank 6 is attached to the bottom of the fixed ladder 8 and removed. We made an auxiliary ladder that can be suspended and used.   The auxiliary ladder was made with the ladder frame 1 having a total length of 1340 mm and a width of 260 mm. The foot member 2 was riveted to the child frame 1 at 210 mm intervals. The thickness of the ladder frame 1 is The stepping member 2 has a plate thickness of 2 and is manufactured by molding a 2.5 mm aluminum alloy plate material. ． A 5 mm aluminum alloy plate material was used.

[0023]   Also, on the rear surface of the upper end of the ladder frame 1, the upper stopper member 3A of the hanging tool 3 is riveted. It was fixed by a stopper. The upper stopper member 3A having an L-shaped cross section is provided with a substantially cross section L below the upper stopper member 3A. Place the lower stopper member 3B in the shape of a letter, and use the wing screw 3C and wing nut as the locking tool. The lower stopper member 3B is locked to the upper stopper member 3A. Upper stopper member 3A and lower stopper The topper member 3B was manufactured by processing a steel plate (SPCC) having a plate thickness of 2 mm. As a locking tool For this, a wing screw 3C and a wing nut made of stainless steel and having a screw portion of 8 mm were used. Pussy The stopper member 3D is a plate-shaped rubber having a plate thickness of 1 mm. The width of the horizontal part of the upper stopper member 3A is 180 mm, depth is 80 mm, and the width of the hanging part of the upper stopper member 3A is 180 m m and height were 30 mm. The lower stopper member 3B is the upper stopper member 3A described above. Corresponding to the dimension of, the width is set to 180 mm, and the depth of the horizontal part of the lower stopper member 3B is 90 mm in width, 40 mm in height of the lower stopper member 3B, lower stopper member The height of the inwardly bent portion of 3B was set to 10 mm.

[0024]   On the other hand, the steady rest arm 4 is separated from the upper end of the ladder frame 1 by a distance of 435 mm. The thumbscrew 5 was used as a locking tool. The steady rest arm 4 Is a plate-shaped member and is manufactured by processing a steel plate (SPCC) having a plate thickness of 2 mm. Swing The length from the upper end to the lower end of the stop arm 4 is 370 mm and is formed in an inverted U shape. The width of one end is 80 mm, and the width of the other end having a through hole is 30 mm. The vertical length was 280 mm. As a locking tool for the steady arm 4, A wing screw 5 and a wing nut having a screw portion of 8 mm and made of stainless steel were used.

[0025]   The auxiliary ladder of the above-described embodiment is a fixed ladder provided by an operator in an elevated water tank. It can be easily installed and used at the bottom of the machine, and is safer for workers than before. It was possible to go up and down via a fixed ladder.

[0026]

[Effect of device]

  According to the auxiliary ladder of the present invention, inspection of equipment such as elevated water tank and cooling tower, When performing work such as repair and cleaning, the worker fixed the equipment installed in the device such as an elevated water tank. It can be easily installed at the bottom of the ladder, and it is also safe via a fixed ladder. Can go up and down.

[Brief description of drawings]

1A is a front view of a ladder of the present invention, and FIG. 1B is a side view thereof.

FIG. 2 is a perspective view illustrating a method of using the hanging device for the ladder shown in FIG.

FIG. 3 is a perspective view showing a usage state of the ladder of the present invention.

FIG. 4 is a sectional view showing a main part in FIG.

[Explanation of symbols]

1 ladder frame 2 stepping members 3 suspenders 3A Upper stopper member 3B Lower stopper member 3C locking tool (thumbscrew) 3D anti-slip member (plate rubber) 4 steady arm 5 Locking tool (thumb screw) 6 elevated water tank 7 fixed ladder 8 Fixed ladder 7 stepping member 11 Arrow indicating the moving direction of stopper member 3B 12, 13 Arrows that indicate the movement direction of steady rest arm 4 H Distance from bottom of fixed ladder 7 to equipment installation surface h Distance from the lower edge of the auxiliary ladder to the equipment installation surface

Claims (2)

[Scope of utility model registration request] 1. An auxiliary ladder that is detachably suspended from a lower portion of a fixed ladder for use, and has a shape capable of gripping an upper step member of the fixed ladder at one end side across the width direction, and the like. A hanging tool whose end is attached to the upper end of the ladder frame and a vertical frame member of the ladder frame that is located a predetermined distance downward from the upper end of the ladder frame, and is fixed to one end of the ladder lower stage. An auxiliary ladder having a shape capable of gripping the stepping member and having a steady arm having a through hole at the other end and a locking tool for locking the steady arm. 2. The hanging tool comprises an upper stopper member having an L-shaped cross section, a lower stopper member having an L-shaped cross section, and a locking tool for locking the movement of the lower stopper member in the front-rear direction. The auxiliary ladder according to claim 1, wherein the auxiliary ladder is provided.